Skip to main content
Electronic Theatre Controls Inc

Express DMX Ports Are Outputting To The Wrong Addresses


The information in this post is provided to assist in troubleshooting. Perform work at your own risk. ENSURE ANY POWER FROM DEVICES HAS BEEN DISCONNECTED BEFORE SERVICING ANY EQUIPMENT. If you do not feel comfortable performing the work, please contact us or your local service center. Be aware that ETC and its Affiliates are not responsible for any damage or injury caused by service of our products by anyone other than us or our authorized service providers, and such damage is excluded from the product’s warranty.


Express DMX ports are outputting data, but to the wrong addresses. I don't have normal control over my lights.


Each port on the Express can be assigned a mode and DMX start address. The mode options are normal or dimmer double. The DMX start address designates where you start for you 512 address range. 1 means it talks to addresses 1-512, or universe 1, and 2 means it talks to addresses 513-1024, or universe 2.

By default, both ports are in Normal mode, port 1's start address is 1, and port 2's start address is 513. You may need to change one of these to output to the DMX addresses you have patched in your console.

Steps to Solution

  1. Press the [Setup] key on your face panel.
  2. Press [2] and [Enter] in setup to navigate to 'Output Configuration'.
  3. Take note of what both ports are assigned to.
  4. If you want to change the settings, follow the red text instructions on the screen to adjust accordingly.


The following video shows how to change both ports to start at address 1:


  • Was this article helpful?